We present measurements of the inclusive production of antideuterons in e+e- annihilation into hadrons at ≈10.58 GeV center-of-mass energy and in Upsilon(1S,2S,3S) decays. The results are obtained using data collected by the BABAR detector at the PEP-II electron-positron collider. Assuming a fireball spectral shape for the emitted antideuteron momentum, we find B(Upsilon(1S) → \bar{d}X) = (2.81\pm 0.49(stat) + 0.20(syst) -0.24(syst) )× 10^{−5}, B(Upsilon(2S) → \bar{d}X) = (2.64\pm 0.11(stat) + 0.26(syst) -0.21(syst) )× 10^{−5}, B(Upsilon(3S) → \bar{d}X) = (2.33\pm 0.15(stat) + 0.31(syst) -0.28(syst) )× 10^{−5}, and σ(e+e- → \bar{d}X) = (9.63 \pm 0.41(stat) + 1.17(syst) - 1.01(syst)) fb.

Antideuteron production in ϒ(nS) decays and in e+e−→qqbar at √s≈10.58  GeV

BETTONI, Diego;BOZZI, Concezio;CALABRESE, Roberto;CIBINETTO, Gianluigi;FIORAVANTI, Elisa;GARZIA, Isabella;LUPPI, Eleonora;SANTORO, Valentina;
2014

Abstract

We present measurements of the inclusive production of antideuterons in e+e- annihilation into hadrons at ≈10.58 GeV center-of-mass energy and in Upsilon(1S,2S,3S) decays. The results are obtained using data collected by the BABAR detector at the PEP-II electron-positron collider. Assuming a fireball spectral shape for the emitted antideuteron momentum, we find B(Upsilon(1S) → \bar{d}X) = (2.81\pm 0.49(stat) + 0.20(syst) -0.24(syst) )× 10^{−5}, B(Upsilon(2S) → \bar{d}X) = (2.64\pm 0.11(stat) + 0.26(syst) -0.21(syst) )× 10^{−5}, B(Upsilon(3S) → \bar{d}X) = (2.33\pm 0.15(stat) + 0.31(syst) -0.28(syst) )× 10^{−5}, and σ(e+e- → \bar{d}X) = (9.63 \pm 0.41(stat) + 1.17(syst) - 1.01(syst)) fb.
2014
Lees, J.  . P.; V., Poireau; V., Tisserand; E., Grauges; A., Palano; G., Eigen; B., Stugu; Brown, D.  . N.; Kerth, L.  . T.; Kolomensky, Y. u.  . G.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2015012
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